Die retaining means



March 20, 1951 F. SSPEICHER 2,545,711

DIE RETAINING MEANS Filed 061?. 26, 1946 -Fig.l. Fig.2. Fig.3.

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Fig.5. Fig.6.

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lNVENTOR Frank S. Spelgher ATTORNEY iatented Mar. 20, 1951 DIE RETAINING MEANS Frank S. Speicher, Pittsburgh, Pa., assignor to M. E. Cunningham Company, Pittsburgh, Pin, a corporation of Pennsylvania Application October 26, 1946, Serial No. 705,847

' 3 Claims. (01. 101-'-2s) of the invention will be readily apparent to those skilled in the art when the following detailed description is read in conjunction With the ac-- companying drawings.

These drawings as shown comprise Figure 1 which is a side View of a stamping tool incorporating an embodiment of the invention; Figure 2 a similar view of the die holder with the lower end section cut away along the transverse center line thereof; Figure 3 a side view of the holder taken at 180 to the view of Figure 1; Figure 4 a bottom plan view of the holder; Figures 5, 6 and 'I narorw and broadside and type-end views of one of the dies, and Figure 8 a side view of the key used to lockthe dies in the holder.

Referring in detail to these drawings, the numeral I designates the die holder proper which consists of an upper handle section and a lower die head. In the die head there is formed a recess 2 in which the necessary complement of dies and/ or spacing blanks 3 are loosely arranged. As shown and as is common practice, these are made out of fiat narrow pieces of steel or other suitable material shaped to just fit in the recess 2 with their type ends projecting the desired distance below the lower end of the head and their upper ends resting against the inner wall of the recess.

In accordance with this improvement to hold the dies in place holes 4 are formed in the dies 3 and holes 5 in the head of the holder 1, both sets of holes being so spaced that they lie in alignment when the dies 3 are properly arranged in the die-receiving recess 2. To fit in these holes 4 and 5 and thereby releasably lock the dies in place, a retainer pin 6 is provided.

This pin is shaped somewhat in the form of a shepherd's staff. The main body of the pin is straight to fit in the holes 4 and 5 of the dies and holder. The intermediate section is bent substantially at right angles to the straight section and the other end is bent backwardly toward the straight section to form a crook.

. 2 Just above the die head of the holder l a hole 1 is formed in the holder in parallel alignment of the holes 5 and so spaced from the latter as to receive the crooked end of the pin 6. As illus-- trated, this hole I is inclined away from the horizontal from both exteriors inwardly so that the crook of the pin 6 which is shaped for such purpose must be flexed in order to insert it in the hole, and can be fitted into the hole from either end. In this way the pin is yieldably, but adequately held in place and the crooked end is forced into the hole 1, but to insure its functioning properly the pin 6 is made of spring material so that it will retain its permanent shape in spite of the necessary deflection required to engage its crooked end in the hole I.

As will be readily appreciated by those skilled in the art, with a locking pin so devised for use it can be very easily removed and replaced for changing dies and fits the holder in such a way as to offer no obstruction to the use of the tool due to the bent portion thereof lying snugly adjacent the narrow side of the tool.

While the advantages of this improvement will be obvious from the foregoing description, it is to be understood that it may take other forms,

all of which are intended to fall within the scope A of the appended claims.

I claim:

1. A stamping tool comprising a holder element having a body portion engageable for manipulation and an end portion provided with a type die-receiving recess, said body portion having an opening therein inclined to a side wall thereof for receiving one end of a type die-retaining pin, and said recessed end portion having aligned openings in each end wall thereof forming the recess, the centers of which latter openings are in parallel alignment with the pin-receiving opening in said body portion, a type die detachably mounted in the recess in the end of said holder element and having a retaining pinreceiving opening therein disposed to lie in aligned relation with the aforesaid openings in the end walls of said end portion recess when the die is in operative position in the recess, and a selflocking continuous type die-retaining pin for holding the type die in said die-receiving recess which consists of a straight portion at one end which fits in the aligned openings in the type die and the end walls of the die-receiving recess, a

portion at the other end which is disposed in the taining pin, and said recessed end portion having aligned openings in each end wallthereof forming the recess, the centers of which latter openings are in parallel alig ith the receiving opening in said b dypijrtfd'ti, a

die detachably mounted in said recess and hav'- ing a retaining pin-receiving 'o prii'ng therein disposed to lie in aligned relation with the aforesaid openings in the end walls of said rid i561" tion recess when the die is in operati e posich is sf i forfn'ed thatitsfstraight st'afi portion fitsin the al n eefij ss i iii; 'r'e e 's ni ans a inee: idx fi we fi e e eea i eiig ges thei pnned o ening in the holder eie mentbody portion.

3. A stamping tool according to claim 2 characterized by the opening in the body portion of the holder element extending all the way through the element and inclined to the opposite walls of the element and the die-receiving recess having openings in both end walls thereof in aligned ree ie .,w h the .O ein 1 2 e iew in epeijatii' pd'siti tin in the recess tgi jpeijmit the retaihiii pin to'be applied from either side of the holder element.

FRANK S. SPEICHER.

REFERENCES CITED flowing re iei'ences are of record in the file bf this patent:

UNITED STATES PATENTS flame Kiam July 21, 1908 

